I have one of these in my JR XP652 radio. I've used it for about two or three months of random flying and simulating, charged it only once. The old NiCd in my Tx was onlt 600mAh, so the newer 2560mAh was a big spec bump.
Just one thing. Never forget your Tx on, or your LiPo will surely die. Forever. And another thing, don't use the original charger, the battery comes with a balance plug so you can charge it with a LiPo balancer/charger.